/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.tdb2.lib;

import java.io.PrintStream;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.apache.jena.atlas.io.IndentedWriter;
import org.apache.jena.atlas.lib.ByteBufferLib;
import org.apache.jena.atlas.lib.Pair;
import org.apache.jena.atlas.lib.tuple.Tuple;
import org.apache.jena.atlas.lib.tuple.TupleFactory;
import org.apache.jena.dboe.base.block.Block;
import org.apache.jena.dboe.base.block.BlockMgr;
import org.apache.jena.dboe.trans.bplustree.BPlusTree;
import org.apache.jena.graph.Node;
import org.apache.jena.query.Dataset;
import org.apache.jena.riot.out.NodeFmtLib;
import org.apache.jena.tdb2.TDBException;
import org.apache.jena.tdb2.store.DatasetGraphTDB;
import org.apache.jena.tdb2.store.NodeId;
import org.apache.jena.tdb2.store.StoragePrefixesTDB;
import org.apache.jena.tdb2.store.nodetable.NodeTable;
import org.apache.jena.tdb2.store.nodetupletable.NodeTupleTable;
import org.apache.jena.tdb2.store.tupletable.TupleIndex;
import org.apache.jena.tdb2.store.tupletable.TupleTable;

public class DumpOps {
    public static void dump(Dataset ds) {
        DatasetGraphTDB dsg = (DatasetGraphTDB)(ds.asDatasetGraph());

        NodeTupleTable nodeTupleTableTriples = dsg.getTripleTable().getNodeTupleTable();
        NodeTupleTable nodeTupleTableQuads = dsg.getQuadTable().getNodeTupleTable();

        if ( nodeTupleTableTriples.getNodeTable() != nodeTupleTableQuads.getNodeTable() )
            throw new TDBException("Different node tables for triples and quads");

        NodeTable nodeTable = nodeTupleTableTriples.getNodeTable();
        // V special.
        Set<NodeTable> dumpedNodeTables = new HashSet<>();

        if ( true ) {
            System.out.print("## Node Table\n");
            dumpNodeTable(nodeTupleTableTriples.getNodeTable(), dumpedNodeTables);
            dumpNodeTable(nodeTupleTableQuads.getNodeTable(), dumpedNodeTables);
        }

        if ( false ) {
            System.out.print("## Triple Table\n");
            dumpNodeTupleTable(nodeTupleTableTriples.getTupleTable());
            System.out.print("## Quad Table\n");
            dumpNodeTupleTable(nodeTupleTableQuads.getTupleTable());
        }

        // Indexes.
        if ( true ) {
            dumpTupleIndexes(nodeTupleTableTriples.getTupleTable().getIndexes());
            dumpTupleIndexes(nodeTupleTableQuads.getTupleTable().getIndexes());
        }

        // Prefixes
        if ( true ) {
            System.out.print("## Prefix Table\n");
            StoragePrefixesTDB prefixes = (StoragePrefixesTDB)dsg.getStoragePrefixes();

            NodeTupleTable pntt = prefixes.getNodeTupleTable();
            if ( !dumpedNodeTables.contains(pntt.getNodeTable()) ) {
                dumpNodeTable(pntt.getNodeTable(), dumpedNodeTables);
                dumpedNodeTables.add(pntt.getNodeTable());
            }
            dumpTupleIndexes(prefixes.getNodeTupleTable().getTupleTable().getIndexes());
        }
    }

    public static void dumpNodeTable(NodeTable nodeTable) {
        dumpNodeTable(nodeTable, null);
    }

    public static void dumpNodeTable(NodeTable nodeTable, Set<NodeTable> dumpedNodeTables) {
        if ( dumpedNodeTables != null && dumpedNodeTables.contains(nodeTable) )
            return;

        Iterator<Pair<NodeId, Node>> iter = nodeTable.all();
        for ( ; iter.hasNext() ; ) {
            Pair<NodeId, Node> pair = iter.next();
            NodeId nid = pair.car();
            Node n = pair.cdr();
            String x = NodeFmtLib.displayStr(n);
            System.out.printf("%016X %s\n", nid.getPtrLocation(), x);
        }
        if ( dumpedNodeTables != null )
            dumpedNodeTables.add(nodeTable);
    }

    public static void dumpTupleIndexes(TupleIndex[] tupleIndexes) {
        for ( TupleIndex tIdx : tupleIndexes )
            dumpTupleIndex(tIdx);
    }

    public static void dumpTupleIndex(TupleIndex tIdx) {
        System.out.print("## " + tIdx.getMappingStr() + "\n");
        Iterator<Tuple<NodeId>> iter = tIdx.all();
        for ( ; iter.hasNext() ; ) {
            Tuple<NodeId> t = iter.next();
            System.out.print(t);
            System.out.print("\n");
        }
    }

    public static void dumpBlockMgr(PrintStream out, BlockMgr blkMgr) {
        try {
            for ( int id = 0 ; id < 9999999 ; id++ ) {
                if ( !blkMgr.valid(id) )
                    break;
                Block blk = blkMgr.getRead(id);
                out.print("id=" + blk.getId() + "  ");
                ByteBufferLib.print(out, blk.getByteBuffer());
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public static void dumpBPlusTree(PrintStream out, BPlusTree bpt) {
        IndentedWriter iw = new IndentedWriter(out);
        bpt.dump(iw);
    }

    public static void dumpBPlusTreeBlocks(BPlusTree bpt) {
        System.out.println("Data blocks");
        DumpOps.dumpBlockMgr(System.out, bpt.getRecordsMgr().getBlockMgr());
        System.out.println("Node blocks");
        DumpOps.dumpBlockMgr(System.out, bpt.getRecordsMgr().getBlockMgr());
    }

    public static void dumpNodeTupleTable(TupleTable tupleTable) {
        int N = tupleTable.getTupleLen();
        NodeId[] nodeIds = new NodeId[N];
        Arrays.fill(nodeIds, NodeId.NodeIdAny);

        Tuple<NodeId> t = TupleFactory.asTuple(nodeIds);

        Iterator<Tuple<NodeId>> iter = tupleTable.find(t);
        for ( ; iter.hasNext() ; ) {
            Tuple<NodeId> tuple = iter.next();
            System.out.print(tuple);
            System.out.print("\n");
        }
    }
}
